linux-kernel - Re: [PATCH] x86-64: espfix for 64-bit mode *PROTOTYPE*

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Message-ID: <535EEF10.1080602@zytor.com>
Date:	Mon, 28 Apr 2014 17:15:12 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andrew Lutomirski <amluto@...il.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
CC:	comex <comexk@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Borislav Petkov <bp@...en8.de>,
	Arjan van de Ven <arjan.van.de.ven@...el.com>,
	Brian Gerst <brgerst@...il.com>,
	Alexandre Julliard <julliard@...ehq.com>,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86-64: espfix for 64-bit mode *PROTOTYPE*

On 04/28/2014 05:02 PM, Andrew Lutomirski wrote:
> 
> I'm compiling your branch.  In the mean time, two possibly stupid questions:
> 
> What's the assembly code in the double-fault entry for?
> 

It was easier for me to add it there than adding all the glue
(prototypes and so on) to put it into C code... can convert it to C when
it works.

> Have you tried hbreak in qemu?  I've had better luck with hbreak than
> regular break in the past.

Yes, no real change.

	-hpa


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